759414

Sigma-Aldrich

Tetraethyl orthosilicate

packaged for use in deposition systems

Synonym(s):
Orthosilicic acid tetraethyl ester, Tetraethyl orthosilicate, Silicon tetraethoxide, Tetraethyl silicate, TEOS, Tetraethoxysilane, Tetraethoxysilicon(IV)
Linear Formula:
Si(OC2H5)4
CAS Number:
Molecular Weight:
208.33
Beilstein/REAXYS Number:
1422225
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23
Pricing and availability is not currently available.

vapor density

7.2 (vs air)

Quality Level

vapor pressure

<1 mmHg ( 20 °C)

assay

≥99.5% (GC)

form

liquid

refractive index

n20/D 1.382 (lit.)

bp

168 °C (lit.)

density

0.933 g/mL at 20 °C (lit.)

SMILES string

CCO[Si](OCC)(OCC)OCC

InChI

1S/C8H20O4Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8H2,1-4H3

InChI key

BOTDANWDWHJENH-UHFFFAOYSA-N

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Application

Tetraethyl orthosilicate (TEOS) is an oxygen containing precursor of Si used for the deposition of:
  • Si oxide
  • Oxycarbide
  • Doped silicate
  • Silanol
  • Siloxane polymer
  • Organosilicon thin films

The films can be deposited at low temperatues (<250 °C). TEOS is also used to deposit mesoporous and nanoporous thin films of silica. These porous films can be doped during deposition to further enhance their properties.
Commonly used as a precursor to prepare xerogel
Will interact with dodecylamine in the formation of intercalation compounds of H+-magadiite and used in a study of mixed-metal bioactive glasses.

Packaging

25 mL in stainless steel cylinder

Pictograms

FlameExclamation mark

Signal Word

Warning

Hazard Statements

Target Organs

Respiratory system

Hazard Codes

Xn

Risk Statement

10-20-36/37

RIDADR

UN1292 - class 3 - PG 3 - Tetraethyl silicate

WGK Germany

WGK 1

Flash Point(F)

113.0 °F - closed cup

Flash Point(C)

45 °C - closed cup

  1. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  2. How do I find price and availability?

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  3. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

Andreas Kay et al.
Journal of the American Chemical Society, 128(49), 15714-15721 (2006-12-07)
Thin films of silicon-doped Fe2O3 were deposited by APCVD (atmospheric pressure chemical vapor deposition) from Fe(CO)5 and TEOS (tetraethoxysilane) on SnO2-coated glass at 415 degrees C. HRSEM reveals a highly developed dendritic nanostructure of 500 nm thickness having a feature...
Lin Lin et al.
Colloids and surfaces. B, Biointerfaces, 101, 97-100 (2012-07-17)
Hollow silica spheres with round mesoporous shells were synthesized by core-shell template method, using monodispersed cationic polystyrene particles as core, and TEOS (tetraethoxysilane) as the silica source to form shell. After calcination at 550°C, uniform spheres with a thin shell...
Evan M Hetrick et al.
Biomaterials, 30(14), 2782-2789 (2009-02-24)
The ability of nitric oxide (NO)-releasing silica nanoparticles to kill biofilm-based microbial cells is reported. Biofilms of Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus, Staphylococcus epidermidis, and Candida albicans were formed in vitro and exposed to NO-releasing silica nanoparticles. Replicative viability...
Tom Hasell et al.
Advanced materials (Deerfield Beach, Fla.), 24(42), 5732-5737 (2012-08-30)
Macroscopic inorganic porous beads are imbibed with a "porous molecular additive" by simple solution processing techniques, resulting in controllable loading and increased surface area. The porous additive consists of soluble organic cage molecules that precipitate as microporous crystals when solutions...
Nils R Blumenthal et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(45), 16124-16129 (2014-10-29)
Extracellular soluble signals are known to play a critical role in maintaining neuronal function and homeostasis in the CNS. However, the CNS is also composed of extracellular matrix macromolecules and glia support cells, and the contribution of the physical attributes...

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